*{
	margin: 0;
	padding: 0;
	list-style: none;
	text-decoration: none;
}
a:hover{
	text-decoration: none;
}	

.banner{
	height: 600px;
}
.banner1{
	background: url(img/banner.jpg);
	background-size: 100%;
}
.banner2{
	background: url(img/banner2.jpg);
	background-size: 100%;
}
.banner3{
	background: url(img/banner3.jpg);
	background-size: 100%;
}
.banner4{
	background: url(img/banner4.jpg);
	background-size: 100%;
}
main{
	background: url(img/31417791658ba67899c4e7283a0ee029.jpg);
}
footer{
	background: #F5F5F5;
	padding-top: 30px;
	border-bottom: 2px solid #E2E2E2;
	margin-bottom: 10px;
}
footer ul li a{
	color: #3E73C3;
}

/*手机端*/
@media (max-width:650px) {
	.banner{
		height: 260px;
	}
}